What is the mass number of an atom of potassium that has 20 neutrons?
A) 39
B) 59
C) 35
D) 19
E) 15
Correct Answer:
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Q32: Which of the following descriptions of a
Q33: The elements lithium, sodium, and potassium
A)have the
Q34: Consider an isotope of sodium with a
Q35: The elements sodium, magnesium, and silicon
A)are in
Q36: Identify the metalloid in the following list.
A)sulfur
B)copper
C)silver
D)fluorine
E)germanium
Q38: The element in this list with chemical
Q39: How many protons are in an isotope
Q40: According to the Atomic Theory,
A)atoms are neither
Q41: Which of the following electron configurations is
Q42: Given the following:
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